Paddlers using Oregon's waters, including the Lower Columbia River Water Trail need to carry up to date aquatic invasive species prevention permits. The 2013 permits are now available through the Oregon State Marine Board and the Oregon Dept. of Fish and Wildlife. Permits are requred for paddlecraft and non-motorzied vessels 10 ft and longer for residents and non-residents. Costs range from $5-$14 depending on place of purchase and period of time (1-2 years).
Visit the Oregon State Marine Board Aquatic Invasive Species Page for more information and purchasing options.